Using a computed tomography miniscanner for studying tillage induced soil compaction |
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| Institution: | 1. Research Centre on the Durability and the Productivity of Industrial Plantations (CRDPI), Av. Ma Loango Moe Poaty BP 1291, Pointe-Noire, Republic of the Congo;2. Departement de Phytotechnologie, Institut National Supérieur d''agronomie et de Biotechnologie, Franceville, Gabon;3. Ecole Nationale Supérieure d''Agronomie et de Foresterie (ENSAF), Université Marien Ngouabi, Brazzaville, Republic of the Congo;4. Departement de Sciences Fondamentales de l''Ingénieur, Institut National Supérieur d''agronomie et de Biotechnologie, Franceville, Gabon |
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| Abstract: | Gamma-ray computed tomography (CT) is used to study thin compacted soil layers, such as millimeter thick “blades” that occur at plowing depth. The technique has the advantage, over the traditional gamma-ray attenuation techniques, of opening the possibility of measuring water contents and bulk-densities of odd-shaped samples. Being a 2-or 3-dimensional technique it is possible to detect small change of bulk-density and soil water content within the sample, even in thin layers of the order of millimeters. Results are reported for thin compacted layers in soil samples collected at the plowing depth from sugar-cane fields in Brazil, which clearly demonstrate the usefulness of this new method for compaction investigations and its quantitative evaluation. |
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